/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2016        */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be        */
/* attached to the FatFs via a glue function rather than modifying it.   */
/* This is an example of glue functions to attach various exsisting      */
/* storage control modules to the FatFs module with a defined API.       */
/*-----------------------------------------------------------------------*/

#include "diskio.h"		/* FatFs lower layer API */

#include "diskdrv_MMC.h"
#include "diskdrv_RAM.h"
#include "diskdrv_USB.h"

/* Definitions of physical drive number for each drive */
#define DEV_RAM		2	/* Example: Map Ramdisk to physical drive 0 */
#define DEV_MMC		1	/* Example: Map MMC/SD card to physical drive 1 */
#define DEV_USB		0	/* Example: Map USB MSD to physical drive 2 */


/*-----------------------------------------------------------------------*/
/* Get Drive Status                                                      */
/*-----------------------------------------------------------------------*/

DSTATUS disk_status(
	BYTE pdrv		/* Physical drive nmuber to identify the drive */
)
{
	switch (pdrv)
    {
    	case DEV_RAM :
    		return RAM_disk_status();

    	case DEV_MMC :
    		return MMC_disk_status();

    	case DEV_USB :
    		return USB_disk_status();
	}
    
	return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Inidialize a Drive                                                    */
/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize(
	BYTE pdrv				/* Physical drive nmuber to identify the drive */
)
{
	switch (pdrv)
    {
    	case DEV_RAM :
    		return RAM_disk_initialize();

    	case DEV_MMC :
    		return MMC_disk_initialize();

    	case DEV_USB :
    		return USB_disk_initialize();
	}
    
	return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */
/*-----------------------------------------------------------------------*/

DRESULT disk_read(
	BYTE pdrv,		/* Physical drive nmuber to identify the drive */
	BYTE *buff,		/* Data buffer to store read data */
	DWORD sector,	/* Start sector in LBA */
	UINT count		/* Number of sectors to read */
)
{
	switch (pdrv)
    {
    	case DEV_RAM :
    		return RAM_disk_read(buff, sector, count);

    	case DEV_MMC :
    		return MMC_disk_read(buff, sector, count);

    	case DEV_USB :
    		return USB_disk_read(buff, sector, count);
	}

	return RES_PARERR;
}



/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */
/*-----------------------------------------------------------------------*/

DRESULT disk_write(
	BYTE pdrv,			/* Physical drive nmuber to identify the drive */
	const BYTE *buff,	/* Data to be written */
	DWORD sector,		/* Start sector in LBA */
	UINT count			/* Number of sectors to write */
)
{
	switch (pdrv)
    {
    	case DEV_RAM :
    		return RAM_disk_write(buff, sector, count);

    	case DEV_MMC :
    		return MMC_disk_write(buff, sector, count);

    	case DEV_USB :
    		return USB_disk_write(buff, sector, count);
	}

	return RES_PARERR;
}



/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/

DRESULT disk_ioctl(
	BYTE pdrv,		/* Physical drive nmuber (0..) */
	BYTE cmd,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
	switch (pdrv)
    {
    	case DEV_RAM :
    		return RAM_disk_ioctl(cmd, buff);

    	case DEV_MMC :
    		return MMC_disk_ioctl(cmd, buff);

    	case DEV_USB :
    		return USB_disk_ioctl(cmd, buff);
	}

	return RES_PARERR;
}


